by Rick Jervis, USA TODAY

by Rick Jervis, USA TODAY

FORT HOOD, Texas â?? The prosecution rested its case Tuesday in the court-martial of Maj. Nidal Hasan, the Army psychiatrist charged with killing 13 people and injuring 31 others during a shooting spree here four years ago.

The court adjourned until Wednesday morning, prompting questions as to what defense â?? if any â?? Hasan has planned. It's the trial's 11th day.

"It's hard to imagine," said Victor Hansen, a law professor at New England Law Boston and former Army judge advocate. "I don't know that there could be much of a defense at this point."

Hasan, 42, who is representing himself, has admitted in earlier hearings and in his opening statement that he was the shooter in the on-base rampage Nov. 5, 2009, that left 12 soldiers and one civilian dead and injured nearly three dozen others. He faces the death penalty if convicted and could become the first person the U.S. military puts to death in five decades.

Hasan has said he does not plan to call any witnesses on his behalf but could take the stand himself. Judge Col. Tara Osborn reminded Hasan on Tuesday that if he calls himself to the stand, he'll need to ask himself questions in accordance with court rules, not just make statements. Prosecutors will also get the chance to cross-examine him in that scenario.

Military prosecutors called 89 witnesses, many of whom painted a vivid and at times graphic picture of the shooting rampage in and around Building 42003 of the Soldiers Readiness Processing complex. Prosecutors also introduced reams of evidence ranging from bullet fragments pulled from victims to the FN 5.7 semiautomatic handgun used in the attack.

Among the prosecution's last witnesses was Maj. Anthony Bonfiglio, who testified that he met Hasan while both were psychiatry residents at Walter Reed National Military Medical Center around 2006. Hasan told him he was applying for a fellowship to avoid being deployed to America's conflicts abroad, Bonfiglio said.

Later, psychiatrist Tonya Kozminski testified that she met Hasan briefly while working at the Carl R. Darnall Army Medical Center at Fort Hood, where Hasan worked. A few weeks before the shooting, Hasan told her his displeasure at the prospect of being deployed overseas and offered a veiled threat if it were to happen, she said.

"They will pay," Hasan said, according to Kozminski.

Base photographer Steven Bennett, who was taking pictures at a nearby graduation ceremony when he heard gunfire nearby, testified that he saw Hasan outside the medical processing center.

Bennett continued taking pictures of the scene, including a few of Hasan after he was shot by base police. "His behavior in relation to the rest of the scene just seemed odd to me," he said.

Hasan has remained mostly quiet during the proceedings, answering the judge with a brisk, polite "yes ma'am" or "I have no objections," and rarely cross-examining witnesses or challenging prosecution evidence. The trial has moved along much faster than expected because of Hasan's complacency in the proceedings.